Bibby B G, Krobicka A
J Dent Res. 1984 Jun;63(6):906-9. doi: 10.1177/00220345840630062001.
A combination pH micro-electrode inserted into human plaque centrifuged to the base of a closely-fitting fine-mesh wire "basket" has been used to make continuous recordings of the pH responses produced by exposure to various carbohydrate substrates. The pH depressions given by continued immersion in sugar and starch solutions resemble, both in depth and duration, those obtained by telemetric pH measurements of approximal plaque samples. In contrast, brief exposure to sugar solutions will produce a Stephan type of pH curve. Measurements of pH can be made using a succession of different substrates if, after each substrate is tested, the electrode-plaque assembly is washed with water and its acidity neutralized in circulating saliva. It is suggested that this in vitro pH method could be used instead of the telemetric measurements of approximal plaque for comparing acid production from foods or for other purposes.
将组合式pH微电极插入离心至紧密贴合的细网金属“篮筐”底部的人牙菌斑中，用于连续记录暴露于各种碳水化合物底物时产生的pH响应。持续浸泡在糖溶液和淀粉溶液中引起的pH下降，在深度和持续时间上，类似于通过遥测法测量邻面菌斑样本所获得的pH下降。相比之下，短暂暴露于糖溶液会产生斯蒂芬型pH曲线。如果在每次测试一种底物后，用水冲洗电极-菌斑组件，并在循环唾液中中和其酸度，那么就可以使用一系列不同的底物进行pH测量。有人提出，这种体外pH测量方法可以替代邻面菌斑的遥测测量，用于比较食物的产酸情况或其他目的。
